Apparently I was the victim of a lightning strike today, mid-mission. When I reset the UPS and logged back onto RvS, all my settings were gone. I was even "Player" instead of "John Doe". After resetting my controls in Options, I rejoined the game on PG1. I could chat and load into the game, switch weapons, but absolutely no movement occurred due to keys or mouse input and weapons would not fire. Yet, before going in-mission, my mouse works normally and after leaving mission it works normally.